72160521529 has 16 divisors (see below), whose sum is σ = 74814879744. Its totient is φ = 69527001600.

The previous prime is 72160521527. The next prime is 72160521551. The reversal of 72160521529 is 92512506127.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72160521529 - 2¹ = 72160521527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72160521491 and 72160521500.

It is not an unprimeable number, because it can be changed into a prime (72160521527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13786897 + ... + 13792129.

It is an arithmetic number, because the mean of its divisors is an integer number (4675929984).

Almost surely, 2^72160521529 is an apocalyptic number.

It is an amenable number.

72160521529 is a deficient number, since it is larger than the sum of its proper divisors (2654358215).

72160521529 is a wasteful number, since it uses less digits than its factorization.

72160521529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 72160521529 in words is "seventy-two billion, one hundred sixty million, five hundred twenty-one thousand, five hundred twenty-nine".